Tunneling & Underground Works
Shaft Construction
(Vertical access shafts for tunnel entry and ventilation)
Tunnel Support
(Shotcrete, rock bolts, and mesh for tunnel stability)
Grouting for Tunnel Stability
(Grouting to fill voids and prevent water inflow)
Tunneling & Underground Works
Tunneling services in DR Congo require specialized techniques to ensure safe, efficient access below ground. These works involve constructing shafts, stabilizing tunnels, and controlling ground movement or water ingress to protect structural integrity and long-term performance.
- Enables construction of tunnels for utilities, transport, and access
- Ensures tunnel stability through structural reinforcement and ground treatment
- Controls groundwater and soil movement to prevent tunnel collapse or flooding
What is Shaft Construction?
Shaft construction involves the creation of vertical or near-vertical passages used for access, ventilation, or material transport in tunneling and underground projects. These shafts are typically excavated from the surface downward and are reinforced with linings or support systems to maintain stability. Shaft construction is essential for initiating tunnel works, enabling equipment and personnel entry, and ensuring proper airflow and emergency access throughout the project.
What is Tunnel Support?
Tunnel support involves the installation of structural systems that stabilize tunnel walls and ceilings during excavation and after completion. These systems are crucial for maintaining safety, especially in unstable ground conditions. Common methods include shotcrete (sprayed concrete), rock bolts, and wire mesh, which work together to reinforce the tunnel, control deformation, and prevent collapse. Tunnel support ensures the integrity of underground spaces throughout construction and long-term use.
What is Grouting for Tunnel Stability?
Grouting for tunnel stability is a ground improvement method used in tunneling projects to strengthen and stabilize the soil or rock around the tunnel. It involves injecting a fluid grout mixture—such as cement-based, chemical, or resin grout—into cracks, voids, and weak zones surrounding the tunnel excavation. This process fills empty spaces and binds loose materials, reducing water seepage and increasing the load-bearing capacity of the ground. As a result, grouting helps prevent tunnel deformation, collapse, and water infiltration, ensuring a safer and more stable tunnel structure throughout its construction and service life.
